There are many ways to play, you can use Bluetooth / TF Card / U disk / aux

Built in microphone for hands-free calls

Fast charging, built-in 400mah capacity battery, charging for 2-3 hours, can last for 2-3 hours

Product details
Battery: 3.7V 400mah
Frequency response: 50 hz-20 kHz
Receiving distance: 10M
Gross weight: 230g
Support function: Bluetooth / USB flash disk / TF Card / audio output
Bluetooth version: v4.1
Product size: 9.5 * 5 * 7cm

Product packaging
loudspeaker box *1

Manual *1

Power cable *1

Audio cable *1